Multi-Tech Systems MT2834BR, MT2834BLR Digital Loopback Test Remote/Automatic Synchronous Mode

Page 63

Chapter 5 - Testing the Modem

5.6Digital Loopback Test (Remote/Automatic) (Synchronous Mode)

This test must be run when you have a data connection with another modem. To initiate the Digital Loopback Test (remote/automatic), DIP- Switch #9 must be in the DOWN position, then place DIP-Switch #16 in the opposite position it is currently (the modem requires a state of change in Switch #16 to activate Loopback tests). Once you receive an OK message from your modem (if responses are enabled), the local modem is placed in Digital Loopback mode.

To exit the Digital Loopback Test (remote/automatic), pull out and then reinsert modem card into modem card cage.

Computer or Terminal	Computer or Terminal
UUUU
Local Modem	Remote Modem

Digital Analog

Analog Digital

Figure 5-6. Digital Loopack Test (remote / automatic) (Syncronous)

63

Image 63

Contents User Guide Revision Date Description Contents AT Commands and S-Register Summary Introduction Introduction FeaturesHow to Use This Manual Installation Telephone Line PreliminariesCard Cage Serial CableInstallation PC Board Controls Switch Function Position Effect DIP-Switch SettingsAnswer/Originate Originate call Async/Sync/Leased Line Dip Switch Settings #13 Position Effect OOS Busy Out Toggle Switch2 MI/MIC Option Jumper Out of Service/Test JumperDial-Up and Leased Lines Modem LED Indicators On-Line Diagnostics Installation Serial Port Limitations How Can You Identify Your Uart Type? MSD Uart Identification, Screen Configuring Software for Your Modem Configuring Your SoftwareAT &F X4 S0=0 M PC Initialization StringsMEW Modem Initialization Setup Macintosh Initialization Changing Default ParametersMEW Configuration Parameters Screen Configuring Software for Your ComputerTerminal Emulation Configuring Software for the Remote SystemFile Transfer Protocols When to Disable Data CompressionAT &F S0=0 X4 &E14 M Disabling Error CorrectionModem Commands Modem AT Commands Commands = 0, 1, 2 or DP0 #F2 Command Values Default = speed Q0 selects Result Codes displayed Reads value of S-Register r and displays value = 4 or Tone Command Break Atcr Values Default Description Callback Security CommandsCallback password with xxxxxx being callback password Remote Configuration Procedures Remote ConfigurationPassword Commands 4 V.25bis CommandsCSPs Escape Code Character RegistersLine Feed Character S10 Carrier Loss Disconnect Delay Time S25 DTR Dropout Time S36 Time Between DTR Inactive and Modem Off-Hook Result CodesTerse Verbose No Dial Tone Busy No Answer AT Commands and S-Register Summary Modem Testing Uuuu Local Analog Loopback Test/V.54 LoopDigital Loopback Test/V.54 Loop 2 Local/Manual Digital Loopback Test local / manual Digital Loopback Test remote / automatic Digital Loopback Test/V.54 Loop 2 Remote/AutomaticLocal Analog Loopback Test Syncronous Mode Local Analog Loopback Test Synchronous ModeDigital Loopback Test Local / manual Syncronous Digital Loopback Test Local/Manual Synchronous ModeDigital Loopack Test remote / automatic Syncronous Digital Loopback Test Remote/Automatic Synchronous ModeWarranty and Service Limited Warranty Service Tech SupportRecording Modem Information Upgrading the MT2834BR Using FlashPro to Upgrade Modem FirmwareSafety Warnings Internet Babt Requirements Compliance with Babt Requirements European Low Voltage Directive Compliance with BS6789 .1 and Part Compliance with BS6328 Part Appendices Appendix a Appendix a Canadian Limitations Notice Data Rates modem Appendix B Technical SpecificationsFlow Control 2400 & 1200 bps Frequency Stability Index Index Index Index MNP SCC XON/XOFF S000316